Sheet-delivery mechanism for printing-presses



(No Model.)

J. T. HAWKINS.

SHEETI DELIVERY MEUHANISM POR 'PRINTING PRESSES.

No. 319,249. PatentedJun 2, 188:5.

w ne u :s lull I a" Y* I l i 'Maf @MQW UNTTED STATES PATENT JOHN T. HAWKINS, OF TAUNTON, MASSACHUSETTS.

SHEET-DELWERY MEQHANISM FOR PRINTING-PRESSES.

SPECIFICATON forming part of Letters Patent NO. 319.2%9, dated June 2, 1885.

Application led July 7, 1884. l (No model.)

To @ZZ whom it may concern:

Be it known that I, JOHN T. HAwKrNs, of Taunton, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Sheet-Delivery Mechanism for Printing-Presses, which improvement or invention is fully set forth and illustrated in the following specification and accompanying drawings.

The object of this invention is to prevent smutting and soiling the newly-printed surfaces of sheets in the process of delivering them from a printing-press in all such methods of delivery as bring delivery cylinders, strings, tapes, or iiy-fingers in contact with said newly-printed sides.

The invention consists of the parts hereinafter particularly described, and spciicall'y set forth in the claims.

In the accompanying drawings, Figure l is a sectional elevation, and Fig. 2 a rear elevation, partly in section, of those parts of a cylinder printing-press involving this invention. Fig. 3 is an end elevation of the traversing worm and guide, hereinafter described.

In said figures the several parts are respectively indicated by letters, as follows:

AAindicateportions ofthe main sideframes, one of which has the upper part broken away in Fig. 1 to show the interior parts.

B is the impression-cylinder, and c a shaft journaled in the frames A, carrying a series of delivery wheels or cylinders, C, or one continuous delivery-cylinder, as may be preferred. 3 5 B is a gear-wheel secured to the impressioncylinder B, or its shaft, and C is a similar gear meshing with gear B', secured to shaft c. rlhe cylinders B and C each carry the usual grippers, g g', operated to open and close at the 4o proper times in any of the usual and wellknown ways.

D is a shaft journaled in the frames A, carrying a series of tape or cord pulleys, D.

D2 indicates a series of cords or tapes en- 4 5 wrapping the delivery-cylinders O and the tape orcord pulleys D.

E is a shaft carrying a series of pressurepulleys, E. Said shaft is journaled in the frames A in such manner as to rise and fall 5o slightly, to allow said pulleys to rest by their own Weight upon the cylinders C, or upon the sheets as they pass between the pulleys and the cylinders. Said pulleys are generally placed to run over the unprinted margins ofthe sheets.

F is a shaft journaled in boxes F', adjustably secured to the frames A by the springs F2 and the set-screws F3. Upon shaft F is secured a covering of flannel, felt, cotton cloth, or other suitable cleansing and ink-absorbing materiaLF, made continuous or in sections,ac cording as the delivery-cylinder C may be made continuous or in a series of short cylinders, preferably the latter way, as shown in the drawings.

Secured to shaft F by a feather, F5, in such a way that the shaft F may freely slide within it endwise, but be forced to rotate with it, is a ratchet, F6. Said ratchet is held from moving endwise with the shaft F by a cap, F7, secured to the frames A. The set-screws F3 limit the upward position of the shaft F, and the springs F2 keep shaft F up to that limit. Thus the set-screws FI may be set so that the covering F* of shaft F shall come in contact with the surface of the delivery-cylinder C, and with the cords or tapes D2, enwrapping them, and remove from them any ink which may adhere to them as offset upon them by.

the passing sheets. Sliding in the lug G, secured to the frame A, is a rod, G', having pivoted to its upper end a pawl, G2, which engages the ratchet F6. The rod G, carrying the pawl G2, is depressed by a spring, G, surrounding said rod and reacting against the lug G and a collar, G, secured to the rod G by a set-screw, G5.

Pivoted to the frame A at GG is a lever, G7, carrying a roller, G8, which engages an incline on the type-bed, such as is indicated in dotted lines at H, Fig. 1. The rod G is pivoted to the lever G7 at G9.

By the mechanism j ust described the shaft F may be rotated one tooth of the ratchet F6 for each double excursion of the type-bed. (The type-bed itself is omitted in the figures for the sake of clearness of illustration.)

To one end of shaft F is secured an endless worm, W, and pivoted in a bracket, V, extending from one of the frames A, is a' curved guide, W2, engaging the endless groove in the worm W. Fig. 3 gives an end elevation of this apparatus, which constitutes a well-known ICO - shaft by means of its own rotation.

device for giving a reciprocating motion to a Thus by the slow intermittent rotation of shaft F, by means of the ratchet F and pawl G2, said shaft also acquires a slow end motion by means of the worm W and guide W2, and thus continuously presents a new surface of its covering F'2 in contact with the delivery-cylinders C and strings or tapes D2 until said covering may bccomesocompletely soiled as to require renewal.

The obj ect of the mechanism so far 'described is to cleanse and keep clean the surfaces of the delivery-cylinders C and the cords or tapes D2. The movements of the pad or roller F2 are sufficiently slow to permit any portion of its vsurface once soiled to become dried before again being presented to act as an ink-absorbent surface.

The shaft I, journaled in the frames A, has secured to it at one end a toothed pinion, I.

I2 is a toothed sector engaging the pinion I', pivoted to frame A at I3.

I4 is a lug attached to the frame A, through which slides a connecting-rod, I5. Surrounding the rod I5 is a spring, I, reacting against lug It, and a collar, I2, secured to rod I5 by a set-screw, IS. Pivoted to frame A at I9 is a bell'- crank lever, Im, carrying a roller, I, which engages an incline on the type-bed, such as is indicated at H in dotted lines, Fig. l. The rod I5 is pivoted at one end to the toothed sector I2 and at the other end to the bellcrank Im.

The mechanism just described serves to oscillate the shaft I and anything that may be attached to it through a given angle (and return through the same angle) depending upon the proportions of the parts for each double excursion of the type-bed.

Secured to shaft I are two arms, K, into which is journaled a shaft, K. Secured to shaft K is a ratchet, K2. Pivoted to one of the frames A is a pawl, K2, engaging the ratchet K2. Secured to shaft I are a series of yokes, L. in which are journaled a series of sleeves, L. Secured to the sleeves L are a series of worm-wheels, L2, engaging a series of endless worms, L2, which are in turn secured to shaft K. A series of y-fingers, j', are securedin the sleeves L. Said fingers are made of a circular cross section, so that, as intermittentently rotated, they shall present a new surface to the advancing sheet.

The object of the last-described mechanism is to slightly rotate the fly-iingersf for the delivery of each sheet, and to make this rotation so slight that sufficient time may elapse in the performance of one entire revolution for the ink which may be deposited on said fingers from a sheet to have become dried, and thus to prevent said ink from being offset upon the sheet then to pass in contact with it on the surfaces of said fingers.

The operation is as follows: The shaft I, be-

ing caused to oscillate for each sheet printed through a sufficient angle to deposit a 'sheet which has passed down in front of the fly-1ingers f upon a suitable receiving-table, (not showin) and to return at the proper time for the reception of the succeeding sheet, carries with lit the shaft K', the yokes L, endless worms L2, worm-wheels L2, ratchet K2, and fly-iingersf- The pawl K3, being pivoted t0 the frame A, and being also limited in motion upon its pivot by a stop-pin, (not shown,) during these movements engages the ratchet K2 and rotates it one tooth for each oscillation of the shaft I, and thus is slightly rotated,through the medium of the worms L2, worm-wheels L2, and sleeves L', the series of fly-fingers f. As above described, therefore, the delivery-cylinders C and cords or tapes D2 are kept clean by means of the cleansing and ink-absorbing covering F2 of the shaft F, while the fly-fingers present a new surface to each sheet, said fingers being rotated so slowly as to permit of any ink which may have been deposited upon them to become dried before the same surfaces of said fingers are again presented to a sheet, and in this way the sheets are always delivered clean.

I do not confine myself to the method shown of oscillating the fly-shaft I and its attached mechanism, nor to that of rotating the fly-fin-v gers f, nor to the mechanism described as at- 'tached to the fly-shaft I, for rotating said yfingers, as these operations may be performed in many well-known mechanical ways; nor do I confine'myself to the method shown of rotating and moving endwise the shaft F, with its absorbent covering, as these movements also may be performed in many other suitable ways best adapted to the various forms of printingpresses; but

As of my invention I claiml. In a printing-press in which the sheets :are delivered by means of a delivery cylinder or cylinders, as G, which take the sheets from the impression-cylinder by means of grippers, as g, a cleansing and absorbent rotary pad or roller, as F4, heldin contact with said delivjery cylinder or cylinders and automatically moved endwise for the purpose of cleansing` Iand keeping the same clean, substantially as 4set forth.

2. In a printing-press in which the sheets are delivered by means of a delivery .cylinder `or cylinders, as C, which take the sheets from `the impression-cylinder by means of grippers, as g', in combination with said cylinder or cyl- `inders and tapes D2, acleansing and absorbing ICO rotary pad or roller, as F4, automatically moved,

endwise to present a new, unsoiled, or 'dried surface in contact with said cylinder and tapes zfor the delivery of each sheet, substantially as `set forth.

3. In a printing-press in which the sheets are delivered by means of a delivery cylinder or cylinders, as C, and tapes or cords, as D2, in combination with said cylinders and tapes, a cleansing and absorbent pad or roller, as F2, held in contact with said delivery cylinder or cylinders and with said tapes or cords, and au'- tomatically moved to present a new, unsoiled, or dried surface in Contact with the same for the delivery of each sheet, substantiaily as set forth.

4. In a printingpress, in combination With its delivery mechanism as part thereof, a series of oscillating and rotating ily-lingers coming in contact with the freshly-printed sides of the sheets, whereby an unsoiled surface of said fly-fingers is presented to each succeeding sheet, or a surface upon which the ink shall have had suiiicient time to become dried before said surface is presented to a succeeding sheet, substantially as set forth.

5. In a printing-press in which the sheets are delivered by means of a delivery cylinder or cylinders, as C, and cords or tapes, as D,

a cleansing or absorbent pad or roller, as F4,

#held in contact with said delivery cylinder or JOHN T. HAWKINS.

Witnesses:

G. R. WATERBURY, FRANCIS P. REILLY. 

